Molded case circuit breaker with opening and closing indication and detection functions

Abstract

The utility model discloses a molded case circuit breaker with opening and closing indication and detection functions, which comprises a support table and an indication assembly which are arranged on a middle cover, the indication assembly comprises a shell frame, an indication rod and a push rod, a first signal switch is arranged on the side wall of one side of the shell frame, and a second signal switch is arranged on the support table. The first signal switch is provided with a first trigger elastic piece extending to be located on the movement path of the pushing part, the second signal switch is provided with a second trigger elastic piece extending to be located on the movement path of the indicating part, and the first signal switch is triggered to act through the pushing part according to the reciprocating motion of the indicating rod when the circuit breaker is switched off or switched on. And the indicating part triggers the second signal switch to act, so that two groups of detection feedback signals can be output at the same time when the circuit breaker is switched off or switched on, the effects of self-detection and external detection can be achieved, the independence and accuracy of the self-detection line and the external detection line can be ensured by utilizing the two signal switches, the structural design is simple, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, and particularly relates to a molded case circuit breaker with on-off indication and detection functions. Background Art

[0002] The molded case circuit breaker has the protection functions of overload long-time delay and short-circuit instantaneous tripping, and can also cooperate with an electric operating mechanism to realize the automatic reclosing function. In order to realize the on-off state detection function of the molded case circuit breaker, a common method is to set a mechanical indicating rod on the circuit breaker. The mechanical indicating rod swings reciprocally under the drive of a rotating shaft. The mechanical indicating rod uses simple red and green colors to represent the on-off state. This indicating method is suitable for observing the on-off situation of the circuit breaker on-site. However, the circuit breaker is often installed in the cabinet space, and external personnel are not clear about the on-off situation of the circuit breaker. This requires that the molded case circuit breaker itself should have a self-checking function and an external checking function, that is, an indicating signal for indicating the on-off of the circuit breaker is sent to external equipment. Therefore, a set of auxiliary contact accessories are installed on the circuit breaker. Since there is no extra space left for the accessory slot after the molded case circuit breaker is configured with an electric operating mechanism, and the internal space is limited, and the auxiliary contact accessories occupy a large space and have a high setting cost, it is very easy to be unable to be installed due to the space limitation of the circuit breaker, and it cannot better meet the user's needs. Content of the Utility Model

[0003] Therefore, the purpose of the utility model is to overcome the deficiencies existing in the prior art, so as to provide a molded case circuit breaker with a simple structure, reduced setting cost, and realizing the self-checking and external checking functions of the on-off signal of the product.

[0004] To achieve the above purpose, the utility model provides a molded case circuit breaker with on-off indication and detection functions, which includes a middle cover with an installation groove and a handle and an indicating component arranged in the installation groove. The indicating component includes a housing frame fixed to the middle cover and an indicating rod reciprocally movably arranged in the housing frame. A first signal switch is arranged on one side or both side walls of the housing frame. The indicating rod includes an indicating part extending out of the top of the housing frame and a pushing part extending out of one side or both side walls of the housing frame. The first signal switch has a first trigger spring piece extending on the movement path of the pushing part. A support platform is arranged in the installation groove on one side of the indicating component, and a second signal switch is arranged on the support platform. The second signal switch has a second trigger spring piece obliquely extending on the movement path of the indicating part.

[0005] As a preferred scheme, the second signal switch is installed on the top of the support platform through a connecting structure, and the second trigger spring piece extends above the top of the housing frame and cooperates with the indicating part.

[0006] As a preferred solution, the connection structure includes a plurality of limiting bumps arranged around the second signal switch on the top of the support platform, and a limiting groove formed by surrounding the plurality of limiting bumps, and the second signal switch is installed in the limiting groove.

[0007] As a preferred solution, the connection structure further includes at least one fixing hole provided on the top of the support platform, and at least one connection hole penetrating through the second signal switch corresponding to the fixing hole. The fixing hole is located within the limiting groove, and the second signal switch is fixed to the limiting groove by a fixing member tightly penetrating through the connection hole and the fixing hole.

[0008] As a preferred solution, the support platform is arranged at the gap position between the housing frame and the handle.

[0009] As a preferred solution, an installation platform adjacent to and connected with the support platform is provided in the installation groove. The housing frame is detachably installed on the installation platform. The support platform is arranged higher than the installation platform, and the support platform and the installation platform are integrally formed on the middle cover.

[0010] As a preferred solution, the housing frame includes two cover bodies connected by clamping and a receiving cavity formed between the two cover bodies. The indicating assembly includes a push rod movably arranged in the receiving cavity in the vertical direction, and a first spring arranged between the indicating rod and the housing along the moving direction of the indicating rod. A slope structure in sliding contact is arranged between the push rod and the indicating rod. The slope structure includes a first slope arranged at one end of the push rod and a second slope arranged at the bottom of the indicating rod and in mating contact with the first slope. The other end of the push rod extends and is connected to the driving rotating shaft of the circuit breaker, and the moving direction of the push rod is perpendicular to the moving direction of the indicating rod.

[0011] As a preferred solution, guiding grooves extending along the moving direction of the indicating rod are arranged on one side or both sides of the side wall of the housing frame, and the pushing portion is a sliding push block arranged on one side or both sides of the indicating rod and slidably connected to the guiding grooves.

[0012] As a preferred solution, the indicating portion has a T-shaped structure, and a closing and opening indicating surface is provided on its top.

[0013] As a preferred solution, it further includes a base arranged at the bottom of the middle cover and an upper cover arranged on the top of the middle cover and covering the installation groove. The driving rotating shaft is rotatably arranged in the space between the base and the middle cover. A through hole through which the push rod can pass is provided through the middle cover and the installation platform, so that the other end of the push rod passes through the through hole and then cooperates and abuts against the driving rotating shaft.

[0014] The technical solution of the present utility model has the following advantages compared with the prior art:

[0015] 1. In the molded case circuit breaker provided by the present utility model, a support platform located on one side of the indicating component is provided in the installation groove of the middle cover, and a second signal switch is provided on the support platform. The indicating rod includes an indicating part extending out of the top of the case frame and a pushing part extending out of one side or both side walls of the case frame. The second trigger piece of the second signal switch extends along the movement path of the indicating part, and the first trigger piece of the first signal switch extends along the movement path of the pushing part. By reasonably optimizing the structural components, according to the fact that the indicating rod will move to the opening indication position or the closing indication position when the circuit breaker is opened or closed, during the movement, the indicating rod triggers the first signal switch to act through the pushing part to send a signal indicating that the circuit breaker is closed or opened, and triggers the second signal switch to act through the indicating part to send another signal indicating that the circuit breaker is closed or opened, so that two groups of detection feedback signals can be output simultaneously when the circuit breaker is opened or closed, which can achieve the effects of self-checking and external checking. The use of two signal switches can ensure the independence and accuracy of the two self-checking and external checking lines, so as to timely and accurately feedback the opening and closing states of the circuit breaker to the user, making it safer and more reliable to use. By reasonably utilizing the space of the middle cover to realize the cooperation between the second signal switch and the indicating rod, the structural design is simple, the setting cost is reduced, and the user's needs can be better met.

[0016] 2. In the molded case circuit breaker provided by the present utility model, a limiting groove formed by surrounding a plurality of limiting bumps is provided at the top of the support platform, and a fixing hole is provided in the limiting groove. Corresponding connection holes are provided on the second signal switch opposite to the fixing holes. First, the second signal switch is matched and installed in the limiting groove, and the limiting groove plays a limiting role on the second signal switch. Then, a fixing member passes through the second signal switch and is tightly connected to the fixing hole, thereby realizing the installation and fixation of the second signal switch on the top of the support platform. The installation stability is good, and it is convenient for installation and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art.

[0018] Figure 1 It is a schematic cross-sectional structure diagram of the molded case circuit breaker provided by the present utility model;

[0019] Figure 2 It is a schematic three-dimensional structure diagram of the molded case circuit breaker of the present utility model;

[0020] Figure 3 It is an installation schematic diagram of the first signal switch and the second signal switch of the present utility model;

[0021] Figure 4 It is a schematic structural diagram of the indicating component of the present utility model.

[0022] Description of the Drawings: 1. Middle cover; 11. Installation groove; 12. Installation platform; 2. Base; 3. Upper cover; 5. Indicator assembly; 51. Housing; 52. Indicator rod; 521. Indicator part; 522. Pushing part; 53. Push rod; 54. Inclined surface structure; 55. First spring; 56. Guide groove; 6. Support platform; 61. Limit bump; 62. Limit groove; 63. Fixing hole; 7. First signal switch; 71. First trigger piece; 8. Second signal switch; 81. First trigger piece; 9. Driving rotating shaft; 10. Handle. Detailed Description of the Embodiment

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] In the description of the present utility model, it should be noted that the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0025] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0026] Embodiment

[0027] This embodiment provides as Figures 1-4A molded case circuit breaker with on-off indication and detection functions as shown includes a middle cover 1 having an installation groove 11 and a handle and an indication assembly 5 disposed in the installation groove 11. The indication assembly 5 includes a housing 51 fixed to the middle cover 1 and an indication rod 52 reciprocally movably disposed in the housing 51. A first signal switch 7 is disposed on one or both side walls of the housing 51. The indication rod 52 includes an indication portion 521 extending out of the top of the housing 51 and a pushing portion 522 extending out of one or both side walls of the housing 51. Such an indication rod 52 drives the indication portion 521 to move to the on indication position when the circuit breaker is closed, and drives the indication portion 521 to move to the off indication position when the circuit breaker is opened. A closing-opening indication mark is provided on the indication portion 521. The first signal switch 7 has a first trigger spring piece 71 extending on the movement path of the pushing portion 522. A support platform 6 is disposed in the installation groove 11 on one side of the indication assembly 5. A second signal switch 8 is disposed on the support platform 6. The second signal switch 8 has a second trigger spring piece 81 extending obliquely on the movement path of the indication portion 521. When the first trigger spring piece 71 and the second trigger spring piece are pressed, they will respectively trigger the first signal switch 7 and the second signal switch 8 to act and send corresponding indication signals.

[0028] In the above embodiment, by providing a support platform 6 on one side of the indication assembly 5 in the installation groove 11 of the middle cover 1, and providing a second signal switch 8 on the support platform 6, the second trigger spring piece of the second signal switch 8 extends on the movement path of the indication portion 521, and the first trigger spring piece 71 of the first signal switch 7 extends on the movement path of the pushing portion 522. According to the fact that the indication rod 52 will move to the off indication position or the on indication position when the circuit breaker is opened or closed, during the movement, the indication rod 52 triggers the first signal switch 7 to act through the pushing portion 522 to send a signal indicating that the circuit breaker is closed or opened, and triggers the second signal switch 8 to act through the indication portion 521 to send another signal indicating that the circuit breaker is closed or opened, so that two groups of detection signals can be output simultaneously when the circuit breaker is opened or closed, thereby realizing the effect of self-checking and external checking of the opening-closing signals. Using two signal switches can ensure the independence and accuracy of the two self-checking and external checking lines, so as to timely and accurately feedback the opening-closing state of the circuit breaker to the user, making it safer and more reliable to use. By reasonably utilizing the space of the middle cover to realize the cooperation between the second signal switch and the indication rod, the structural design is simple, the setting cost is reduced, and the user's usage needs can be better met.

[0029] The following will be combined with Figures 2-4 to make a detailed description of the specific setting method of the second signal switch:

[0030] The second signal switch 8 is installed on the top of the support platform 6 through a connecting structure. The second trigger spring extends above the top of the shell frame 51 and cooperates with the indicator part 521. Specifically, when the indicator rod 52 drives the indicator part 521 to move to the closed position, it pushes the second trigger spring to elastically deform. The second signal switch is preferably a micro switch and has a switch button connected to the second trigger spring, so that the second signal switch is triggered to open when the second trigger spring is squeezed; and when the indicator rod 52 drives the indicator part 521 to move to the closed position, it moves away from the second trigger spring. This second trigger spring and the switch button will elastically reset after the external force is removed, thereby triggering the closing of the second signal switch.

[0031] It is further preferred that the connection structure includes a plurality of limiting protrusions 61 arranged around the second signal switch 8 on the top of the support platform 6, and a limiting groove 62 formed by the plurality of limiting protrusions 61, and the second signal switch 8 is installed in the limiting groove 62, wherein the connection structure also includes two fixing holes 63 arranged on the top of the support platform 6, and two connecting holes corresponding to the fixing holes 63 passing through the second signal switch 8, the fixing holes 63 are located in the limiting groove 62, and the second signal switch 8 is fixed to the limiting groove 62 by fastening a fixing member passing through the connecting hole and the fixing hole 63. The fixing member is preferably a screw, and the fixing hole 63 is preferably a threaded hole. With this structural setting, the second signal switch 8 is first matched and installed in the limiting groove 62, and the second signal switch 8 is limited by the limiting groove 62, and then the second signal switch 8 is fastened to the fixing hole 63 by a screw passing through the second signal switch 8, thereby realizing the installation and fixation of the second signal switch on the top of the support platform, with good installation stability and convenient installation and disassembly.

[0032] like Figure 2 As shown, the support platform 6 is arranged in the gap position between the shell frame 51 and the handle, and a mounting platform 12 adjacent to the support platform 6 is provided in the mounting groove 11. The shell frame 51 can be detachably mounted on the mounting platform 12. The support platform 6 is arranged higher than the mounting platform 12. The second signal switch 8 and the first signal switch 7 are staggered up and down. The first signal switch is preferably a micro switch. The support platform 6 and the mounting platform 12 are integrally formed in the middle cover 1. The integrated structure has good stability and is easy to form and manufacture.

[0033] The following combination Figures 1-4 The specific structure of the indicator component is described in detail:

[0034] The frame 51 includes two cover bodies connected by snap fasteners and a receiving cavity formed between the two cover bodies, and hook assemblies for mounting the first signal switch 7 are provided on the side walls of the two cover bodies. The indicating assembly 5 includes a push rod 53 movably arranged in the vertical direction in the receiving cavity, and a first spring 55 arranged between the indicating rod 52 and the housing along the moving direction of the indicating rod 52. A second spring is provided between the top of the push rod 53 and the frame 51. The first spring 55 and the second spring are respectively used to drive the indicating rod 52 and the push rod 53 to perform reset movement. A slope structure 54 in sliding contact is arranged between the push rod 53 and the indicating rod 52. The slope structure 54 includes a first slope arranged at one end of the push rod 53, and a second slope arranged at the bottom of the indicating rod 52 and in mating contact with the first slope. The other end of the push rod 53 extends and is connected to the driving rotating shaft 9 of the circuit breaker. The driving rotating shaft 9 is used to drive the moving contact to make a closing contact or a breaking disconnection with the static contact. The moving direction of the push rod 53 is perpendicular to the moving direction of the indicating rod 52. The indicating part 521 has a T-shaped structure, and a closing and opening indicating surface is provided at its top. With this structural arrangement, when the circuit breaker is tripped, the driving rotating shaft 9 drives the push rod 53 to move upward and compress the second reset spring. The push rod 53 pushes the indicating rod 52 to move rightward to the tripping indicating position, causing the indicating rod 52 to compress the first spring 55, thereby realizing the tripping indication of the indicating assembly 5. During this process, the indicating rod 52 triggers the first signal switch 7 to act through the pushing part 522, and triggers the second signal switch 8 to act through the indicating part 521, so that two signals during the circuit breaker tripping can be detected through the two signal switches; when the circuit breaker is closed, since the driving rotating shaft rotates away from the push rod 53, the push rod 53 loses the thrust of the driving rotating shaft 9, and the indicating rod 52 and the push rod 53 are respectively driven to reset by the first spring and the second spring, that is, the indicating rod 52 is switched from the tripping indicating position to the closing state under the action of the spring force, thereby realizing the closing indication of the indicating assembly. At the same time, the two signal switches simultaneously perform a reset action after the indicating rod is reset, so that two signals during the circuit breaker closing can be detected through the two signal switches; thus, it can be seen that the molded case circuit breaker adopting the technical solution of the present invention can not only realize the closing and opening indication function, but also realize the self-inspection and external inspection functions of the circuit breaker closing and opening signals.

[0035] Such as Figure 4As shown, on one or both side walls of the frame 51, there are guide grooves 56 extending along the moving direction of the indicating rod 52. The pushing portion 522 is a sliding push block provided on one or both sides of the indicating rod 52 and slidably connected to the guide groove 56. One end of the sliding push block passing through the guide groove 56 is cooperatively abutted against the first trigger spring piece 71 of the first signal switch 7. This first trigger spring piece extends obliquely on the movement path of the sliding push block. The cooperation between the sliding push block and the guide groove 56 guides the movement of the indicating rod 52, thereby converting the vertical movement of the push rod 53 into the horizontal movement of the indicating rod 52.

[0036] The molded case circuit breaker of this embodiment further includes a base 2 provided at the bottom of the middle cover, an upper cover 3 provided at the top of the middle cover and covering the installation groove 11, and an electric operating mechanism provided in the installation groove 11 and connected to the handle. The automatic opening and closing operations of the molded case circuit breaker are realized through the electric operating mechanism. The driving rotating shaft 9 is rotatably arranged in the space between the base 2 and the middle cover 1. A through hole through which the push rod 53 can pass is provided through the middle cover 1 and the installation table 12. The other end of the push rod 53 passes through the through hole and is cooperatively abutted against the driving rotating shaft 9. The push rod 53 and the driving rotating shaft 9 are arranged in a transmission cooperation in this way. A limiting step opposite to the installation table 12 up and down is provided near the upper end of the push rod 53, which can block the upper end of the push rod from passing through the through hole to play a limiting role.

[0037] Obviously, the above embodiments are only examples clearly described and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the creation of the present utility model.

Claims

1. A molded case circuit breaker with opening / closing indication and detection functions, comprising a middle cover (1) having an installation groove (11) and a handle and indication assembly (5) arranged in the installation groove (11), wherein the indication assembly (5) includes a housing frame (51) fixed to the middle cover (1) and an indication rod (52) reciprocally movably arranged in the housing frame (51), and is characterized in that: A first signal switch (7) is provided on one or both side walls of the frame (51). The indicating rod (52) includes an indicating portion (521) protruding from the top of the frame (51) and a pushing portion (522) protruding from one or both side walls of the frame (51). The first signal switch (7) has a first trigger elastic piece (71) extending on the movement path of the pushing portion (522). A support platform (6) is provided in the installation groove (11) on one side of the indicating assembly (5). A second signal switch (8) is provided on the support platform (6). The second signal switch (8) has a second trigger elastic piece (81) extending obliquely on the movement path of the indicating portion (521).

2. The molded case circuit breaker with opening and closing indication and detection functions according to claim 1, wherein: The second signal switch (8) is installed on the top of the support platform (6) through a connection structure. The second trigger elastic piece (81) extends above the top of the frame (51) and cooperates with the indicating portion (521).

3. The molded case circuit breaker with closing and opening indication and detection functions according to claim 2, characterized in that: The connection structure includes a plurality of limit bumps (61) arranged around the second signal switch (8) on the top of the support platform (6), and a limit groove (62) formed by surrounding the plurality of limit bumps (61). The second signal switch (8) is installed in the limit groove (62).

4. The molded case circuit breaker with opening / closing indication and detection functions according to claim 3, characterized in that: The connection structure further includes at least one fixing hole (63) provided on the top of the support platform (6), and at least one connection hole penetrating through the second signal switch (8) corresponding to the fixing hole (63). The fixing hole (63) is located in the limit groove (62), and the second signal switch (8) is fixed to the limit groove (62) by a fixing member tightly penetrating through the connection hole and the fixing hole (63).

5. The molded case circuit breaker with opening / closing indication and detection functions according to claim 1, characterized in that: The support platform (6) is arranged at the gap position between the frame (51) and the handle.

6. The molded case circuit breaker with closing and opening indication and detection functions according to claim 5, characterized in that: An installation platform (12) adjacent to and connected with the support platform (6) is provided in the installation groove (11). The frame (51) is detachably installed on the installation platform (12). The support platform (6) is arranged higher than the installation platform (12). The support platform (6) and the installation platform (12) are integrally formed on the middle cover (1).

7. The molded case circuit breaker with closing and opening indication and detection functions according to any one of claims 1-6, characterized in that: The frame (51) includes two cover bodies connected by buckles and a receiving cavity formed between the two cover bodies. The indicating assembly (5) includes a push rod (53) movably arranged vertically in the receiving cavity, and a first spring (55) arranged between the indicating rod (52) and the housing along the moving direction of the indicating rod (52). An inclined surface structure (54) in sliding contact is provided between the push rod (53) and the indicating rod (52). The other end of the push rod (53) extends to connect with the driving rotating shaft (9) of the circuit breaker. The moving direction of the push rod (53) is perpendicular to the moving direction of the indicating rod (52).

8. The molded case circuit breaker with closing and opening indication and detection functions according to claim 7, characterized in that: One or both side walls of the frame (51) are provided with guiding grooves (56) extending along the moving direction of the indicating rod (52). The pushing portion (522) is a sliding push block arranged on one or both sides of the indicating rod (52) and slidably connected to the guiding grooves (56).

9. The molded case circuit breaker with opening and closing indication and detection functions according to claim 8, characterized in that: The indicating portion (521) has a T-shaped structure, and a closing and opening indicating surface is provided on its top.

10. The molded case circuit breaker with opening and closing indication and detection functions according to claim 7, characterized in that: It further includes a base (2) provided at the bottom of the middle cover, an upper cover (3) provided at the top of the middle cover and covering the installation groove (11), and an electric operating mechanism provided in the installation groove (11) and connected to the handle; the driving rotating shaft (9) is rotatably arranged in the space between the base (2) and the middle cover (1), and a through hole through which the push rod (53) can pass is provided through the middle cover (1) and the installation table (12), so that the other end of the push rod (53) passes through the through hole and is cooperatively abutted against the driving rotating shaft (9).

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